Preparation of grouts using ash and slag from combustion of coal–water slurry fuel

Coal waste recycling is of high priority of this day. A promising and approved solution is the use of coal slurry to prepare coal–water suspensions. The obtained coal–water fuels can be used at thermal and water power plants, while ash and slag from fuel combustion is suitable for preparation of grouts. The mineral compositions of ash and slag from combustion of coal–water slurry fuel in special vortex burner are analyzed. High content of silicon oxide and aluminum oxide in combination with low content of carbon conditions efficient use of ash and slag in production of construction materials, first of all, grouts, widely applicable in mining, backfilling, etc. This article describes the studies of rheological properties and strength of grouts made of ash and slag. Recycling of coal slurry, ash and slag from coal preparation plants and coal-fired electric power plants can considerably abate adverse environmental impacts and improve economics.

Volkov M. A., Grinyuk A. P., Murko V. I., Khyamyalyaynen V.A., Baev M. A. Preparation of grouts using ash and slag from combustion of coal–water slurry fuel. MIAB. Mining Inf. Anal. Bull. 2020;(8):97-104. [In Russ]. DOI: 10.25018/0236-1493-2020-8-0-97-104.

The study was supported by the Russian Foundation for Basic Research, Project No. 20-43-420016/20.

M.A. Volkov¹, Manager,
A.P. Grinyuk¹, Deputy Manager for Production and Technical Policy,
V.I. Murko¹, Dr. Sci. (Eng.), Professor, Deputy Manager for Science, e-mail: sib_eco@mail.ru,
V.A. Khyamyalyaynen², Dr. Sci. (Eng.), Professor, Head of Chair,
M.A. Baev², Senior Lecturer,
¹ Branch of Sibniiugleobogashchenie LLC, Prokopyevsk, Russia,
_² T.F. Gorbachev Kuzbass State Technical University, 650000, Kemerovo, Russia.

V.I. Murko, e-mail: sib_eco@mail.ru.

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